Main thing is she doesn't know about RB. RB is still a mystery to her. Even during the court scene,she thought about what maasi said about RB. And she was about to believe maasi until RB gave his statement to save Veena.
So I guess,it's not totally her fault. They both need to know about each other. Then only this miscommunication and MU will go
though she doesn't know abt him that much but staying with him in the same room and has been respected and treated better than she could ever imagine..but still she has doubt Bajaj can hire someone to kill her ex..